Find the hosts the catalogue already holds, and name them after their planets' star

The archive's default-parameter rows leave sy_dist blank for 100 planets, TRAPPIST-1's seven
among them, so the matcher could not place a host the catalogue had drawn since the Gaia
nearby query (Gaia DR3 2635476908753563008, 12.47 pc). fetchExoplanets now also reads the
Planetary Systems Composite table (pscomppars) and fills a default row's blank host cells from
it. Only host columns: a composite row takes each column from its own reference, so orbits
still come from the default row alone, one fit per planet. Where both tables give a distance or
a position they agree on all 6 225 and 6 352 rows.

Three hosts the catalogue holds by name failed the distance ratio test because the archive's
sy_dist, from TICv8, contradicts its own parallax: Lalande 21185 (GJ 411) 5.68 pc against
392 mas, Luyten's Star (GJ 273) 5.92 against 263 mas, Struve 2398 B (Gl 725 B) 6.84 against
285 mas. resolveHostStarId now takes the archive's parallax (sy_plx) as a second distance the
ratio test accepts. It is a second chance, not a replacement: 47 of 5 959 systems disagree past
the tolerance, and for faint far hosts the inverse parallax is the worse figure (K2-238: 538 pc
by sy_dist, 6 779 by parallax).

Planets on a catalogue star: 2 071 -> 2 090 of 6 354. The 19 gained are TRAPPIST-1 (7),
GJ 273 (2), GJ 411 (2), Gl 725 B, HD 62509 (Pollux), K2-65, TOI-2267 A and B, and two
brown-dwarf hosts, 2MASS J02192210-3925225 and DENIS-P J082303.1-491201. No planet lost or
changed its host.

A matched host whose catalogue name is a bare Gaia designation now takes the archive's host
name, so search finds TRAPPIST-1, Teegarden's Star, TOI-700, LP 791-18 and K2-18: 575 stars
renamed. validateExoplanets refuses a host that is still only a designation, and the star
assets are rewritten after the exoplanets for that reason; stars.bin and stars-meta.bin are
unchanged. TOI-2267 A and B both land on one Gaia entry, which takes the name TOI-2267 A.

Each planet also carries its host's radius, effective temperature and luminosity (10^st_lum),
and a mass for 6 344 planets instead of 5 474, from the default row where it gives one and the
composite table otherwise, for the star-physics step.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/app/shared/models/exoplanet.model.ts

@@ -2,11 +2,14 @@ import { OrbitalElements } from './body.model';
 
 /**
  * A confirmed exoplanet from the NASA Exoplanet Archive (`Planetary Systems` TAP table),
- * cross-referenced to its host star in the HYG index where possible.
+ * cross-referenced to its host star in the star catalogue.
  */
 export interface ExoplanetRecord {
   id: string;
-  hostStarId: number | null; // null if the host star could not be cross-referenced to HYG
+  /**
+   * The host's star-catalogue id, the HYG or Gaia star it was matched to; null when none is.
+   */
+  hostStarId: number | null;
   hostStarName: string;
   name: string;
   radiusEarth?: number;
@@ -20,6 +23,15 @@ export interface ExoplanetRecord {
   periodDays?: number;
   /** Host star mass in solar masses (`st_mass`); the fallback when no period is published. */
   hostStarMassSolar?: number;
+  /**
+   * The host's radius in solar radii (`st_rad`), effective temperature in kelvin (`st_teff`) and
+   * luminosity in solar luminosities (10^`st_lum`), where the archive gives them: the planet's
+   * default row first, then the composite table, whose columns may each come from a different
+   * reference. Measured, where `stellar.ts` otherwise derives a luminosity from V and distance.
+   */
+  hostStarRadiusSolar?: number;
+  hostStarTemperatureK?: number;
+  hostStarLuminositySolar?: number;
   /**
    * The host star's own published astrometry (`ra`, `dec`, `sy_dist`, `sy_pmra`, `sy_pmdec`) —
    * everything the cross-reference above was resolved from.